author  unc0rr 
Sat, 16 May 2009 17:02:25 +0000  
changeset 2065  748c35c94779 
parent 2064  727f68f22915 
child 2066  d0e3f570b901 
permissions  rwrr 
4  1 
(* 
1066  2 
* Hedgewars, a free turn based strategy game 
883  3 
* Copyright (c) 2004, 2005, 2007, 2008 Andrey Korotaev <unC0Rr@gmail.com> 
4  4 
* 
183  5 
* This program is free software; you can redistribute it and/or modify 
6 
* it under the terms of the GNU General Public License as published by 

7 
* the Free Software Foundation; version 2 of the License 

4  8 
* 
183  9 
* This program is distributed in the hope that it will be useful, 
10 
* but WITHOUT ANY WARRANTY; without even the implied warranty of 

11 
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 

12 
* GNU General Public License for more details. 

4  13 
* 
183  14 
* You should have received a copy of the GNU General Public License 
15 
* along with this program; if not, write to the Free Software 

16 
* Foundation, Inc., 59 Temple Place  Suite 330, Boston, MA 021111307, USA 

4  17 
*) 
18 

19 
unit uIO; 

20 
interface 

21 
uses SDLh; 

22 
{$INCLUDE options.inc} 

23 

24 
const ipcPort: Word = 0; 

25 

26 
procedure SendIPC(s: shortstring); 

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procedure SendIPCXY(cmd: char; X, Y: SmallInt); 
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procedure SendIPCRaw(p: pointer; len: Longword); 
4  29 
procedure SendIPCAndWaitReply(s: shortstring); 
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procedure SendIPCTimeInc; 
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procedure LoadRecordFromFile(fileName: shortstring); 
159  32 
procedure IPCWaitPongEvent; 
4  33 
procedure IPCCheckSock; 
34 
procedure InitIPC; 

35 
procedure CloseIPC; 

36 
procedure NetGetNextCmd; 

37 

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var hiTicks: Word = 0; 
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4  40 
implementation 
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uses uConsole, uConsts, uWorld, uMisc, uLand, uChat, uTeams; 
4  42 
const isPonged: boolean = false; 
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type PCmd = ^TCmd; 
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TCmd = packed record 
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Next: PCmd; 
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Time: LongWord; 
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case byte of 
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1: (len: byte; 
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cmd: Char; 
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X, Y: SmallInt); 
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2: (str: shortstring); 
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end; 
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49  55 
var IPCSock: PTCPSocket = nil; 
4  56 
fds: PSDLNet_SocketSet; 
57 

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headcmd: PCmd = nil; 
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lastcmd: PCmd = nil; 
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function AddCmd(Time: Longword; str: shortstring): PCmd; 
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var Result: PCmd; 
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begin 
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new(Result); 
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FillChar(Result^, sizeof(TCmd), 0); 
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Result^.Time:= Time; 
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Result^.str:= str; 
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if Result^.cmd <> 'F' then dec(Result^.len, 2); // cut timestamp 
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if headcmd = nil then 
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begin 
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headcmd:= Result; 
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lastcmd:= Result 
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end else 
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begin 
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lastcmd^.Next:= Result; 
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lastcmd:= Result 
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end; 
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AddCmd:= Result 
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end; 
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procedure RemoveCmd; 
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var tmp: PCmd; 
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begin 
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TryDo(headcmd <> nil, 'Engine bug: headcmd = nil', true); 
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tmp:= headcmd; 
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headcmd:= headcmd^.Next; 
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if headcmd = nil then lastcmd:= nil; 
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dispose(tmp) 
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end; 
4  90 

91 
procedure InitIPC; 

92 
var ipaddr: TIPAddress; 

93 
begin 

94 
WriteToConsole('Init SDL_Net... '); 

95 
SDLTry(SDLNet_Init = 0, true); 

96 
fds:= SDLNet_AllocSocketSet(1); 

97 
SDLTry(fds <> nil, true); 

98 
WriteLnToConsole(msgOK); 

99 
WriteToConsole('Establishing IPC connection... '); 

100 
SDLTry(SDLNet_ResolveHost(ipaddr, '127.0.0.1', ipcPort) = 0, true); 

101 
IPCSock:= SDLNet_TCP_Open(ipaddr); 

102 
SDLTry(IPCSock <> nil, true); 

103 
WriteLnToConsole(msgOK) 

104 
end; 

105 

106 
procedure CloseIPC; 

107 
begin 

108 
SDLNet_FreeSocketSet(fds); 

109 
SDLNet_TCP_Close(IPCSock); 

110 
SDLNet_Quit 

111 
end; 

112 

113 
procedure ParseIPCCommand(s: shortstring); 

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var loTicks: Word; 
4  115 
begin 
116 
case s[1] of 

22  117 
'!': begin {$IFDEF DEBUGFILE}AddFileLog('Ping? Pong!');{$ENDIF}isPonged:= true; end; 
4  118 
'?': SendIPC('!'); 
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'#': inc(hiTicks); 
351  120 
'e': ParseCommand(copy(s, 2, Length(s)  1), true); 
4  121 
'E': OutError(copy(s, 2, Length(s)  1), true); 
122 
'W': OutError(copy(s, 2, Length(s)  1), false); 

367  123 
'M': CheckLandDigest(s); 
4  124 
'T': case s[2] of 
125 
'L': GameType:= gmtLocal; 

126 
'D': GameType:= gmtDemo; 

127 
'N': GameType:= gmtNet; 

72  128 
'S': GameType:= gmtSave; 
4  129 
else OutError(errmsgIncorrectUse + ' IPC "T" :' + s[2], true) end; 
130 
else 

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loTicks:= SDLNet_Read16(@s[byte(s[0])  1]); 
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AddCmd(hiTicks shl 16 + loTicks, s); 
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{$IFDEF DEBUGFILE}AddFileLog('IPC in: '+s[1]+' ticks '+inttostr(lastcmd^.Time));{$ENDIF} 
4  134 
end 
135 
end; 

136 

137 
procedure IPCCheckSock; 

138 
const ss: string = ''; 

371  139 
var i: LongInt; 
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buf: array[0..255] of byte; 
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s: shortstring absolute buf; 
4  142 
begin 
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if IPCSock = nil then 
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exit; 
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351  146 
fds^.numsockets:= 0; 
4  147 
SDLNet_AddSocket(fds, IPCSock); 
148 

149 
while SDLNet_CheckSockets(fds, 0) > 0 do 

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begin 
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i:= SDLNet_TCP_Recv(IPCSock, @buf[1], 255  Length(ss)); 
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if i > 0 then 
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begin 
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buf[0]:= i; 
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ss:= ss + s; 
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while (Length(ss) > 1)and(Length(ss) > byte(ss[1])) do 
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begin 
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ParseIPCCommand(copy(ss, 2, byte(ss[1]))); 
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Delete(ss, 1, Succ(byte(ss[1]))) 
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end 
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end else OutError('IPC connection lost', true) 
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end; 
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end; 
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procedure LoadRecordFromFile(fileName: shortstring); 
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var f: file; 
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ss: string = ''; 
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i: LongInt; 
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buf: array[0..255] of byte; 
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s: shortstring absolute buf; 
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begin 
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assign(f, fileName); 
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reset(f, 1); 
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repeat 
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BlockRead(f, buf[1], 255  Length(ss), i); 
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if i > 0 then 
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begin 
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buf[0]:= i; 
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ss:= ss + s; 
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while (Length(ss) > 1)and(Length(ss) > byte(ss[1])) do 
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begin 
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ParseIPCCommand(copy(ss, 2, byte(ss[1]))); 
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Delete(ss, 1, Succ(byte(ss[1]))) 
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end 
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end 
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until i = 0; 
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close(f) 
4  191 
end; 
192 

193 
procedure SendIPC(s: shortstring); 

194 
begin 

49  195 
if IPCSock <> nil then 
196 
begin 

197 
if s[0]>#251 then s[0]:= #251; 

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SDLNet_Write16(GameTicks, @s[Succ(byte(s[0]))]); 
1432  199 
{$IFDEF DEBUGFILE}AddFileLog('IPC send: '+s[1]);{$ENDIF} 
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inc(s[0], 2); 
49  201 
SDLNet_TCP_Send(IPCSock, @s, Succ(byte(s[0]))) 
202 
end 

4  203 
end; 
204 

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procedure SendIPCRaw(p: pointer; len: Longword); 
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begin 
208  207 
if IPCSock <> nil then 
208 
begin 

209 
SDLNet_TCP_Send(IPCSock, p, len) 

210 
end 

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end; 
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procedure SendIPCXY(cmd: char; X, Y: SmallInt); 
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var s: shortstring; 
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begin 
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s[0]:= #5; 
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s[1]:= cmd; 
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SDLNet_Write16(X, @s[2]); 
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SDLNet_Write16(Y, @s[4]); 
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SendIPC(s) 
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end; 
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procedure SendIPCTimeInc; 
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const timeinc: shortstring = '#'; 
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begin 
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SendIPCRaw(@timeinc, 2) 
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end; 
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228 

159  229 
procedure IPCWaitPongEvent; 
4  230 
begin 
231 
isPonged:= false; 

232 
repeat 

233 
IPCCheckSock; 

234 
SDL_Delay(1) 

235 
until isPonged 

236 
end; 

237 

159  238 
procedure SendIPCAndWaitReply(s: shortstring); 
239 
begin 

240 
SendIPC(s); 

241 
SendIPC('?'); 

242 
IPCWaitPongEvent 

243 
end; 

244 

4  245 
procedure NetGetNextCmd; 
246 
var tmpflag: boolean; 

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s: shortstring; 
4  248 
begin 
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tmpflag:= true; 
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250 

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while (headcmd <> nil) 
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252 
and tmpflag 
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and ((GameTicks = headcmd^.Time) 
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or (headcmd^.cmd = 's') 
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or (headcmd^.cmd = 'F')) do 
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begin 
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case headcmd^.cmd of 
1038  258 
'+': ; // do nothing  it's just empty packet 
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'L': ParseCommand('+left', true); 
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'l': ParseCommand('left', true); 
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'R': ParseCommand('+right', true); 
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'r': ParseCommand('right', true); 
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'U': ParseCommand('+up', true); 
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'u': ParseCommand('up', true); 
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'D': ParseCommand('+down', true); 
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'd': ParseCommand('down', true); 
1639  267 
'Z': ParseCommand('+precise', true); 
268 
'z': ParseCommand('precise', true); 

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'A': ParseCommand('+attack', true); 
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'a': ParseCommand('attack', true); 
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'S': ParseCommand('switch', true); 
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'j': ParseCommand('ljump', true); 
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'J': ParseCommand('hjump', true); 
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',': ParseCommand('skip', true); 
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's': begin 
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s:= copy(headcmd^.str, 2, Pred(headcmd^.len)); 
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AddChatString(s); 
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WriteLnToConsole(s) 
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end; 
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'F': TeamGone(copy(headcmd^.str, 2, Pred(headcmd^.len))); 
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'N': begin 
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tmpflag:= false; 
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283 
{$IFDEF DEBUGFILE}AddFileLog('got cmd "N": time '+inttostr(headcmd^.Time)){$ENDIF} 
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end; 
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'p': begin 
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TargetPoint.X:= SmallInt(SDLNet_Read16(@(headcmd^.X))); 
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TargetPoint.Y:= SmallInt(SDLNet_Read16(@(headcmd^.Y))); 
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ParseCommand('put', true) 
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end; 
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'P': begin 
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CursorPoint.X:= SmallInt(SDLNet_Read16(@(headcmd^.X)) + WorldDx); 
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CursorPoint.Y:= SmallInt(SDLNet_Read16(@(headcmd^.Y)) + WorldDy); 
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end; 
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294 
'w': ParseCommand('setweap ' + headcmd^.str[2], true); 
1035  295 
't': ParseCommand('taunt ' + headcmd^.str[2], true); 
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'g': ParseCommand('newgrave', true); 
2017  297 
'h': ParseCommand('hogsay ' + copy(headcmd^.str, 2, Pred(headcmd^.len)), true); 
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'1'..'5': ParseCommand('timer ' + headcmd^.cmd, true); 
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#128..char(128 + cMaxSlotIndex): ParseCommand('slot ' + char(byte(headcmd^.cmd)  79), true) 
1035  300 
else 
301 
OutError('Unexpected protocol command: ' + headcmd^.cmd, True) 

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302 
end; 
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303 
RemoveCmd 
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304 
end; 
351  305 

2064  306 
if (headcmd <> nil) and tmpflag then 
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307 
TryDo(GameTicks < headcmd^.Time, 
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308 
'oops, queue error. in buffer: ' + headcmd^.cmd + 
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309 
' (' + inttostr(GameTicks) + ' > ' + 
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310 
inttostr(headcmd^.Time) + ')', 
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311 
true); 
4  312 

2065  313 
isInLag:= ((headcmd = nil) or (not tmpflag)) and (not CurrentTeam^.hasGone); 
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314 

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315 
if isInLag then fastUntilLag:= false 
4  316 
end; 
317 

318 
end. 